I have been nothing but kind and polite to my coworkers. I have taken responsibility.
As I tried to make it clear in my original post, that is the precise reason why I am more sad than before because I have taken responsibility, i have been polite, kind and with smiles. And my co-workers now that I am depressed. And, despite my efforts of taking responsibility and being kind and polite, they continue to be mean towards me. It makes me think they might be doing it on purpose.